package cn.thewee.gourmetmeal.staff.logic;
import java.util.ArrayList;
import java.util.HashMap;
import org.json.JSONArray;
import org.json.JSONException;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.graphics.Bitmap;
import android.util.Log;
import cn.thewee.gourmetmeal.staff.R;
import cn.thewee.gourmetmeal.staff.bean.DbHelper;
import cn.thewee.gourmetmeal.staff.bean.Dish;
import cn.thewee.gourmetmeal.staff.util.JsonDecoder;
import cn.thewee.gourmetmeal.staff.util.Tools;
public class DishesLogic {
private static final String TAG = "DishesLogic";
static SQLiteDatabase db;
static Bitmap dishImg = null;
static final String img_path = "/sdcard/Meishijia/img/";
/**
* 获取菜品种类
* @return
*/
public ArrayList<String> getDishClass(Context context, boolean is4Spinner){
ArrayList<String> class_list = new ArrayList<String>();
if(is4Spinner){
class_list.add(context.getString(R.string.all));
}
db = DbHelper.getInstance(context, null).getReadableDatabase();
Cursor cursor = db.query(DbHelper.TABLE_NAME_DISHES,
new String[]{"distinct dish_class"},
null, null,
null, null, "dish_class");
if(cursor.moveToFirst()){
do{
class_list.add(cursor.getString(0));
}while(cursor.moveToNext());
}
db.close();
cursor.close();
cursor = null;
return class_list;
}
/**
*
* @return HashMap<String,ArrayList<Dish>> key为种类String，ArrayList为种类下的列表
*/
public HashMap<String,ArrayList<Dish>> getDishList(Context context) {
HashMap<String,ArrayList<Dish>> dish_list =
new HashMap<String,ArrayList<Dish>>();
ArrayList<Dish> dish_list4class = new ArrayList<Dish>();
Dish dish = null;
db = DbHelper.getInstance(context, null).getReadableDatabase();
Cursor cursor = db.query(DbHelper.TABLE_NAME_DISHES,
new String[]{"dish_id","dish_name","price","introduction","dish_class","img_path"},
null, null,
null, null, "dish_class");
//如果查询结果不为空开始创建List
if(cursor.moveToFirst()){
StringBuilder curClass = new StringBuilder(cursor.getString(4));//保存当前类别
// Log.i(TAG, "Cursor Count:"+cursor.getCount());
do{
dish = new Dish();
dish.setDish_id(cursor.getString(0));
dish.setDish_name(cursor.getString(1));
dish.setPrice(Double.valueOf(cursor.getString(2)));
dish.setIntroduction(cursor.getString(3));
dish.setDish_class(cursor.getString(4));
dish.setImg_path(cursor.getString(5));
// Log.i(TAG, "["+cursor.getPosition()+"]"+dish.toString());
if(!cursor.getString(4).equals(curClass.toString())){
dish_list.put(curClass.toString(),dish_list4class);
curClass.replace(0, curClass.length(), cursor.getString(4));
dish_list4class = new ArrayList<Dish>();
}
dish_list4class.add(dish);
// Log.i(TAG, "dish_list4class.size="+dish_list4class.size());
}while(cursor.moveToNext());
入
dish_list.put(curClass.toString(),dish_list4class);
}
//关闭数据库
db.close();
cursor.close();
cursor = null;
return dish_list;
}
/**
*
* @return HashMap<String,ArrayList<Dish>> key为种类String，ArrayList为种类下的列表
*/
public HashMap<String,ArrayList<Dish>> getDishList(Context context,
String dishClass) {
//总列表
HashMap<String,ArrayList<Dish>> dish_list =
new HashMap<String,ArrayList<Dish>>();
//各个种类列表
ArrayList<Dish> dish_list4class = new ArrayList<Dish>();
Dish dish = null;
db = DbHelper.getInstance(context, null).getReadableDatabase();
Cursor cursor = db.query(DbHelper.TABLE_NAME_DISHES,
new String[]{"dish_id","dish_name","price","introduction","dish_class"},
"dish_class = ?", new String[]{dishClass},
null, null, "dish_class");
if(cursor.moveToFirst()){
do{
//新建菜品Dish实例
dish = new Dish();
dish.setDish_id(cursor.getString(0));
dish.setDish_name(cursor.getString(1));
dish.setPrice(Double.valueOf(cursor.getString(2)));
dish.setIntroduction(cursor.getString(3));
dish.setDish_class(cursor.getString(4));
//插入种类列表
dish_list4class.add(dish);
if(cursor.isLast()){
//如果当前是最后一行,则将种类的菜品列表加入到菜品总列表中
dish_list.put(cursor.getString(4),dish_list4class);
}
}while(cursor.moveToNext());
}
//关闭数据库
db.close();
cursor.close();
cursor = null;
return dish_list;
}
/**
* 通过ID查找
* @param dish
*/
public Dish getDishById(Context context, String dishId){
Dish dish = new Dish();
SQLiteDatabase db = DbHelper.getInstance(context, null).getReadableDatabase();
Cursor cursor = db.query(DbHelper.TABLE_NAME_DISHES,
new String[]{"dish_name", "price", "introduction", "dish_class"},
"dish_id=?", new String[]{dishId},
null, null, null);
if(cursor.moveToFirst()){
dish.setDish_id(dishId);
dish.setDish_name(cursor.getString(0));
dish.setPrice(Double.valueOf(cursor.getString(1)));
dish.setIntroduction(cursor.getString(2));
dish.setDish_class(cursor.getString(3));
}
//关闭游标和数据库实例
cursor.close();
db.close();
return dish;
}
/**
* 获取图片
* @param dishId 编号
* @return 图片Bitmap
*/
public Bitmap getDishImage(Context context, String dish_imgPath){
//若dishImg不为空，则回收之前的图片
if(dishImg!=null){
dishImg.recycle();
}
Tools tools = new Tools();
dishImg = tools.getImgThumb(context, dish_imgPath, 300);
return dishImg;
}
/**
* 获取图片缩略图
* @param dishId 编号
* @return 图片Bitmap
*/
public Bitmap getDishThumbImage(Context context, String dishId){
Tools tools = new Tools();
return tools.getImgThumb(context, dishId, 150);
}
/**
* 回收图片内存
*/
public void recycleDishImg(){
if(dishImg!=null){
dishImg.recycle();
}
}
//从网络更新菜单
public boolean updateMenu(Context context){
//配置参数
HashMap<String,String> params = new HashMap<String,String>();
params.put("num", "1");
params.put("update", "menu");
//获取返回Json转成HashMap
try {
JsonDecoder decoder = new JsonDecoder();
HashMap<String,Object> resultMap = decoder.decode2Map(NetLogic.httpGet("/updateServlet", params));
if(resultMap!=null && resultMap.get("rt").equals("200")){
ArrayList<Dish> dishList = decoder.jsonArray2dishList(context, (JSONArray)resultMap.get("list"));
//向SQLite存入数据
saveDishMenu(context, dishList);
}
} catch (JSONException e) {
e.printStackTrace();
return false;
}
return true;
}
/**
* 将列表保存至本地SQLite数据库
* @param dishList 待保存列表
*/
private void saveDishMenu(Context context, ArrayList<Dish> dishList) {
// TODO Auto-generated method stub
if(dishList != null && dishList.size()>0){
SQLiteDatabase db = DbHelper.getInstance(context, null).getWritableDatabase();
db.delete(DbHelper.TABLE_NAME_DISHES, null, null);
ContentValues values = new ContentValues();
for(Dish dish : dishList){
Log.i(TAG+".saveDishMenu", dish.toString());
values.put("dish_name", dish.getDish_name());
values.put("price", String.valueOf(dish.getPrice()));
values.put("introduction", dish.getIntroduction());
values.put("dish_class", dish.getDish_class());
values.put("dish_unit", dish.getUnit());
values.put("dish_id", dish.getDish_id());
values.put("img_path", dish.getImg_path());
db.insert(DbHelper.TABLE_NAME_DISHES, "dish_id", values);
//清空参数
values.clear();
}
values = null;
db.close();
}
}
}
